Artist: Slipknot
Song: Iowa
Album: Iowa
Bassist: Paul Gray
Tuning: B F# B E (low to high)
Tabber: Spy47 (spy47.com@gmail.com)

Main Riff:
E |2---------------|
B |----0-----------|
F#|--3-------0-----|
B |------0---------|
   1 & 2 & 3 & 4 &

Intro to verse:
E |----------------|
B |----------------|
F#|----------------|
B |7---7-0---3---0-|
   1 & 2 & 3 & 4 &

Verse:
E |------------------------------------|
B |------------------------------------|
F#|------------------------------------|
B |7---7b8-7----(0)5-7---7b8-7---------|
   1 & 2   & 3 & 4 & 1 & 2   & 3 & 4 &

E |------------------------------------|
B |------------------------------------|
F#|------------------------------------|
B |7---7b8-7----(0)5-7---7b8-7-----5-7-|
   1 & 2   & 3 & 4 & 1 & 2   & 3 & 4 &

the (0) is a variation used sometimes

Outro:
In the outro he plays randomly with
2's, 1's and 0's in the 4th string.
It was improvised so it's different everytime.
He ends with a 0.